Compilare: user.cpp: In function ‘int main()’: user.cpp:30: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x user.cpp:31: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x user.cpp:39: warning: comparison between signed and unsigned integer expressions user.cpp:23: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result